Answer:
A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.
If you’re looking for what m is
m+9=21
subtract 9 from both sides
m=12
Answer:
B 
Step-by-step explanation:
Formula of straight line in Point slope form

Here

therefore equation of line having slope 5 and passing through point )1, 9) is given as

K would be 13 I hope his helps
Answer:
15 units
Step-by-step explanation:
Calculate the distance d using the distance formula
d = 
with (x₁, y₁ ) = (- 1, - 5) and (x₂, y₂ ) = (- 10, 7)
d = 
= 
= 
= 
= 15 units